7. Cilantro
Cilantro can regrow from a leftover stem if handled gently. Snip a few inches from the base of a fresh cilantro bunch and place the stems in a glass of water. Make sure the leaves are above the surface and set the glass in sunlight. Roots will form within a week. Once they’re about two inches long, move the stems to soil and keep them moist. With care, your cilantro will regrow into a full plant ready to harvest again.